Best Time to Fly SLC to PDX: On-Time Stats by Hour & Airline
Salt Lake City International → Portland International
Data through July 2026 · Last updated October 18, 2026
2,375 flights were scheduled from Salt Lake City (SLC) to Portland (PDX) in the last 12 months, and 88.6% of those that flew arrived on time, 11.0 points above the US average of 77.6%.
Alaska Airlines was the most punctual of the 4 airlines on the route at 97.8%, while Frontier Airlines trailed at 65.7%.
September has been the best month (93% on time) and Sunday the weakest day of the week (86%).
1.1% of flights were cancelled, versus 1.8% nationally.
SLC to PDX on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Alaska Airlines | 97.8% | 17 min | 0.0% | 46 |
| SkyWest Airlines | 89.2% | 58 min | 0.5% | 596 |
| Delta Air Lines | 88.6% | 56 min | 1.4% | 1,698 |
| Frontier Airlines | 65.7% | 56 min | 0.0% | 35 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SLC to PDX
On-time arrival % by scheduled departure hour (local time), 4,898 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | Limited data | 9 | |
| 7am–8am | 90.0% | 3.8% | 238 |
| 8am–9am | 92.1% | 0.4% | 1,098 |
| 9am–10am | 86.1% | 1.2% | 80 |
| 10am–11am | Limited data | 28 | |
| 11am–12pm | 87.3% | 0.7% | 756 |
| 12pm–1pm | 89.5% | 0.0% | 153 |
| 1pm–2pm | 83.3% | 0.0% | 42 |
| 2pm–3pm | Limited data | 26 | |
| 3pm–4pm | 88.3% | 0.3% | 994 |
| 4pm–5pm | 91.9% | 0.0% | 37 |
| 5pm–6pm | 86.1% | 1.6% | 489 |
| 6pm–7pm | 83.3% | 3.2% | 31 |
| 7pm–8pm | 73.1% | 1.6% | 185 |
| 8pm–9pm | Limited data | 5 | |
| 9pm–10pm | 87.7% | 0.0% | 179 |
| 10pm–11pm | 85.4% | 0.0% | 548 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on SLC to PDX
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 86.3% | -2.9 pts | 0.0% | 95 |
| Christmas & New Year (Dec 20 - Jan 3) | 80.2% | -9.0 pts | 1.5% | 200 |
| Summer peak (Jun 15 - Aug 15) | 84.7% | -4.5 pts | 1.1% | 967 |
| All other days | 89.2% | — | 0.6% | 3,636 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).